Flight Phuket International Airport departs from Phuket Phuket International Airport at 00:15 and arrives at Mumbai Chhatrapati Shivaji International Airport at 03:10.
The flighttime is about 4h 25m. The distance travelled ("as the bird flies"): 2818 Km. So the average speed is roughly 638 Km.
There is an 1.5 hour time difference between Phuket and Mumbai